321906971875 has 12 divisors (see below), whose sum is σ = 402357966192. Its totient is φ = 257525575000.

The previous prime is 321906971863. The next prime is 321906971891. The reversal of 321906971875 is 578179609123.

It is not a de Polignac number, because 321906971875 - 2⁵ = 321906971843 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51501991 + ... + 51508240.

It is an arithmetic number, because the mean of its divisors is an integer number (33529830516).

Almost surely, 2^321906971875 is an apocalyptic number.

321906971875 is a deficient number, since it is larger than the sum of its proper divisors (80450994317).

321906971875 is an frugal number, since it uses more digits than its factorization.

321906971875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103010256 (or 103010236 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 58.

The spelling of 321906971875 in words is "three hundred twenty-one billion, nine hundred six million, nine hundred seventy-one thousand, eight hundred seventy-five".